There is an appeal on tv for funds for Sudan, and the doctor who is making the appeal tells us to text 70800 but he says 'text seventy eight hundred' - surely that would be 7800 and if anyone had trouble seeing the number on the screen they would text the wrong one. Or is it me?
I have a 0 in my Army number and when I used to read it out the Pay Corps Sergeant used to say that I shouldn't get paid as there is no such number as 'O'.
I learned to use zero every time after that!
It's to make the number more memorable. "Seventy, Eight-hundred" is a little more catchy and less of a mouth-full than "Seven, Zero, Eight, Zero, Zero". But granted, your point about the way the doctor delivers the number may not be the best. But then if he is a real doctor - rather than an actor - delivering lines to camera may not be his forte.